/*
moxl - Modular XML Library
Copyright (c) 2007, Malcolm Sparks

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package moxl.relaxng.simplification.normalization.patterns;

import moxl.dom.MoxlElement;
import moxl.dom.MoxlNode;
import moxl.dom.MoxlNodeVisitor;
import moxl.dom.mutable.MutableElement;
import moxl.relaxng.schema.RelaxNgSchemaElementType;

public class PatternNormalizingVisitor implements MoxlNodeVisitor
{
	public void startNode(MoxlNode node)
	{
		if (node instanceof MoxlElement)
		{
			MutableElement el = (MutableElement) node;

			searchAndDestroyDivs(el);

			// Go through children looking for rules
			for (MoxlElement child : el.getChildElements())
			{
				processChild(el, (MutableElement) child);
			}
		}
	}

	private void searchAndDestroyDivs(MutableElement parent)
	{
		boolean repeat = true;
		while (repeat)
		{
			repeat = false;
			for (MoxlElement child : parent.getChildElements())
			{
				if (child.getName().equals(RelaxNgSchemaElementType.div))
				{
					parent.replaceChildWithChildren((MutableElement) child);
					repeat = true;
				}
			}
		}
	}

	ZeroOrMoreTransformer zeroOrMoreTransformer = new ZeroOrMoreTransformer();

	private void processChild(MutableElement parent, MutableElement child)
	{
		if (child.getName().equals(RelaxNgSchemaElementType.zeroOrMore))
		{
			zeroOrMoreTransformer.transform(parent, child);
		}
	}

	public void endNode(MoxlNode node)
	{
	}

}
